When the son of a building contractor is shot dead, investigators Falck and Krämer suspect a connection with the collapse of the "cube", where a cleaner was killed. Was it revenge?

Thomas Becker (Matthias Koeberlin), son of a powerful building contractor (Heiner Lauterbach), is shot on New Year's Day. Commissioner Barbara Falck (Sabine Winterfeldt) and colleague Christian Krämer (Wolf Danny Homann) start the investigation and suspect a connection with the collapse of the "cube", in which a young cleaner was killed. Was the murder of Thomas an act of revenge against the Becker and Sons company?—thetvdb.com

The TV thriller "Murder in the Family - The Rubik's Cube" begins with the murder of Thomas Becker (Matthias Koeberlin). He is the son of the powerful building contractor (Heiner Lauterbach) and is shot dead on New Year's Day. Detective Barbara Falck (Sabine Winterfeldt) and her colleague Christian Krämer (Wolf Danny Homann) take up the investigation and suspect a connection with the collapse of the "Wohnwürfel", in which a young cleaner was killed. Was Thomas' murder an act of revenge against the Becker and Söhne company?